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llvm-project/llvm/test/Transforms/InferFunctionAttrs/annotate.ll

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[attrs] Extract the pure inference of function attributes into a standalone pass. There is no call graph or even interesting analysis for this part of function attributes -- it is literally inferring attributes based on the target library identification. As such, we can do it using a much simpler module pass that just walks the declarations. This can also happen much earlier in the pass pipeline which has benefits for any number of other passes. In the process, I've cleaned up one particular aspect of the logic which was necessary in order to separate the two passes cleanly. It now counts inferred attributes independently rather than just counting all the inferred attributes as one, and the counts are more clearly explained. The two test cases we had for this code path are both ... woefully inadequate and copies of each other. I've kept the superset test and updated it. We need more testing here, but I had to pick somewhere to stop fixing everything broken I saw here. Differential Revision: http://reviews.llvm.org/D15676 llvm-svn: 256466
2015-12-27 16:41:34 +08:00
; RUN: opt < %s -inferattrs -S | FileCheck %s
; RUN: opt < %s -passes=inferattrs -S | FileCheck %s
; RUN: opt < %s -mtriple=x86_64-apple-macosx10.8.0 -inferattrs -S | FileCheck -check-prefix=CHECK-POSIX %s
Move library call prototype attribute inference to functionattrs The simplify-libcalls pass implemented a doInitialization hook to infer function prototype attributes for well-known functions. Given that the simplify-libcalls pass is going away *and* that the functionattrs pass is already in place to deduce function attributes, I am moving this logic to the functionattrs pass. This approach was discussed during patch review: http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20121126/157465.html. llvm-svn: 177619
2013-03-21 08:55:59 +08:00
declare i8* @fopen(i8*, i8*)
Extend 'readonly' and 'readnone' to work on function arguments as well as functions. Make the function attributes pass add it to known library functions and when it can deduce it. llvm-svn: 185735
2013-07-06 08:29:58 +08:00
; CHECK: declare noalias i8* @fopen(i8* nocapture readonly, i8* nocapture readonly) [[G0:#[0-9]]]
Move library call prototype attribute inference to functionattrs The simplify-libcalls pass implemented a doInitialization hook to infer function prototype attributes for well-known functions. Given that the simplify-libcalls pass is going away *and* that the functionattrs pass is already in place to deduce function attributes, I am moving this logic to the functionattrs pass. This approach was discussed during patch review: http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20121126/157465.html. llvm-svn: 177619
2013-03-21 08:55:59 +08:00
declare i8 @strlen(i8*)
; CHECK: declare i8 @strlen(i8* nocapture) [[G1:#[0-9]]]
declare i32* @realloc(i32*, i32)
; CHECK: declare noalias i32* @realloc(i32* nocapture, i32) [[G0]]
; Test deliberately wrong declaration
declare i32 @strcpy(...)
; CHECK: declare i32 @strcpy(...)
[MemoryBuiltins] Remove isOperatorNewLike by consolidating non-null inference handling This patch removes the isOperatorNewLike predicate since it was only being used to establish a non-null return value and we have attributes specifically for that purpose with generic handling. To keep approximate the same behaviour for existing frontends, I added the various operator new like (i.e. instances of operator new) to InferFunctionAttrs. It's not really clear to me why this isn't handled in Clang, but I didn't want to break existing code and any subtle assumptions it might have. Once this patch is in, I'm going to start separating the isAllocLike family of predicates. These appear to be being used for a mixture of things which should be more clearly separated and documented. Today, they're being used to indicate (at least) aliasing facts, CSE-ability, and default values from an allocation site. Differential Revision: http://reviews.llvm.org/D15820 llvm-svn: 256787
2016-01-05 06:49:23 +08:00
; operator new routines
declare i8* @_Znwj(i64)
; CHECK: declare noalias nonnull i8* @_Znwj(i64)
declare i8* @_Znwm(i64)
; CHECK: declare noalias nonnull i8* @_Znwm(i64)
Added support in FunctionAttrs for adding relevant function/argument attributes for the posix call gettimeofday. This implies annotating it as nounwind and its arguments as nocapture. To be conservative, we do not annotate the arguments with noalias since some platforms do not have restrict on the declaration for gettimeofday. llvm-svn: 185502
2013-07-03 12:00:54 +08:00
declare i32 @gettimeofday(i8*, i8*)
Change the gettimeofday test to only test on a posix platform. llvm-svn: 185503
2013-07-03 12:15:22 +08:00
; CHECK-POSIX: declare i32 @gettimeofday(i8* nocapture, i8* nocapture) [[G0:#[0-9]+]]
Added support in FunctionAttrs for adding relevant function/argument attributes for the posix call gettimeofday. This implies annotating it as nounwind and its arguments as nocapture. To be conservative, we do not annotate the arguments with noalias since some platforms do not have restrict on the declaration for gettimeofday. llvm-svn: 185502
2013-07-03 12:00:54 +08:00
Move library call prototype attribute inference to functionattrs The simplify-libcalls pass implemented a doInitialization hook to infer function prototype attributes for well-known functions. Given that the simplify-libcalls pass is going away *and* that the functionattrs pass is already in place to deduce function attributes, I am moving this logic to the functionattrs pass. This approach was discussed during patch review: http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20121126/157465.html. llvm-svn: 177619
2013-03-21 08:55:59 +08:00
; CHECK: attributes [[G0]] = { nounwind }
; CHECK: attributes [[G1]] = { nounwind readonly }
Change the gettimeofday test to only test on a posix platform. llvm-svn: 185503
2013-07-03 12:15:22 +08:00
; CHECK-POSIX: attributes [[G0]] = { nounwind }